Water tank chamber



FIG. 1 is an isometric view of a water tank chamber showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in the figure drawings depict portions of the water tank chamber which form no part of the claimed design. 

CLAIM The ornamental design for a water tank chamber, as shown and described. 